2.  Density is a comparison of how much matter there is in a certain amount of space.

3.  Which square is more dense?

4.  Now which one is more dense?

5.  Density = mass volume  Units for density: g ___ mL or cm 3  Why are these the units for density? ALWAYS REMEMBER UNITS!

6.  Density of Water: 1 g/mL  If the density of a substance is less than 1 g/mL it will float.  If the density of a substance is greater than 1 g/mL it will sink.

7.  Gold has a density of 19 g/mL. Will it sink or float in water?  Butter has a density of.911 g/mL. Will it sink or float in water?

8.  Frank has a paper clip. It has a mass of 9g and a volume of 3cm 3. What is its density?  Frank also has an eraser. It has a mass of 3g, and a volume of 1cm 3. What is its density?

9.  Jack has a rock. The rock has a mass of 6g and a volume of 3cm 3. What is the density of the rock?  Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm 3. What is the density of the rock?

10.  Alicia has a watch. It has a mass of 4g and a volume of 2cm 3. What is the density of the watch?  Joe has a wallet. It has a mass of 15g and a volume of 5cm 3. What is the density of the wallet?

11.  If you pour together liquids that don’t mix and have different densities, they will form liquid layers.  The liquid with the highest density will be on the bottom.  The liquid with the lowest density will be on the top.

12.  Which layer has the highest density?  Which layer has the lowest density?  Imagine that the liquids have the following densities:  10g/cm 3 3g/cm 3  6g/cm 3 5g/cm 3  Which number would go with which layer?

13.  Imagine that the liquids on the right have the following densities:  15g/cm 3 10 g/cm 3  3 g/cm 3 9 g/cm 3  7 g/cm 3 12 g/cm 3  Match the colors to the correct densities. 3g/cm 3 7g/cm 3 9g/cm 3 10g/cm 3 12g/cm 3 15g/cm 3

14.  What is the formula for density?  What happens if you pour together liquids that have different densities?  Will the liquid on the top have the highest or lowest density?  Will the liquid on the bottom have the highest or lowest density?

15.  Jake has a book, a ruler, and a balance.  How can Jake find the density of the book with the tools he has?